We study the frequency-selective broadcast channel with confidential messages (BCC) where the transmitter sends a confidential message to receiver 1 and a common message to receivers 1 and 2. In the case of a block transmission of N symbols followed by a guard interval of L symbols, the frequency-selective channel can be modeled as a N × (N + L) Toeplitz matrix. For this special type of multipl...

An achievable rate region for a 3-node cooperative multiple access channel (CMAC) is presented in this paper. A CMAC contains multiple users cooperatively transmitting information to a single destination node. It includes the traditional multiple access channel that assumes no communication between source nodes, and multiple input single output (MISO) system that contains ideal links between so...

Interference is assumed to be one of the main barriers to improving the throughput of communication systems. Consequently, interference management plays an integral role in wireless communications. Although the importance of interference has promoted numerous studies on the interference channel, the capacity region of this channel is still unknown. The focus of this thesis is on Gaussian interf...

Ahwc-The problem of transmission of separate messages to each of two receivers over a general binary-input broadcast channel is investigated. A new approach to a class of information-t problems is developed and applied to obtain boonds on the cardinalitiea of aoxiliary random variables. These bounds permit the calculation of two different regions of achievable rate pairs which are derived from ...

Abstract An achievable rate region for the Gaussian interference channel is derived using Sato’s modified frequency division multiplexing idea [1] and a special case of Han and Kobayashi’s rate region (denoted by G′ in [2]). We show that the new inner bound includes G′, Sason’s rate region D [3], as well as the achievable region via TDM/FDM [4], as its subsets. The advantage of this improved in...

Let p( yl, y2 1 X) denote a discrete memoryless channel with a single source X and two independent receivers YI and Y2. W e exhibit an achievable region of rates (R11,R12,R22) at which independent information can be sent, respectively, to receiver 1, to both receivers 1 and 2, and to receiver 2. The achievability of the region is shown by using a version of the asymptotic equipartit ion propert...

Abstract—In this paper, we study the achievable rate region of Gaussian multiuser channels with the messages transmitted being from finite input alphabets and the outputs being quantized at the receiver. In particular, we focus on the achievable rate region of i) Gaussian broadcast channel (GBC) and ii) Gaussian multiple access channel (GMAC). First, we study the achievable rate region of two-u...

Abstruct-A new achievable rate region for the general interference channel which extends previous results is presented and evaluated. Tbe technique used is a generalization of superposition coding to the multivariable case. A detailed computation for tbe Gaussian cbaunel case clarifies to wbat extent the new region improves previous ones. The capacity of a class of Gaussian interference channel...